*{
    margin: 0px;
    padding: 0px;
}
.sr-body{
    width: 1000px;
    margin:auto;
}
.sr-body-nav{
    width: 1000px;
    background-color: red;
    height: 200px;
    margin-bottom: 30px;
}
.sr-body-context{
    width: 1000px;
    background-color: red;
    height: auto;
}
ul{
    list-style: none;
}
